A RELATION BETWEEN MAGNETIC-FIELD STRENGTH AND TEMPERATURE IN SUNSPOTS

被引：83

作者：

KOPP, G

RABIN, D

机构：

[1] National Solar Observatory, National Optical Astronomy Observatories, Tucson, 85726-6732, AZ

来源：

SOLAR PHYSICS | 1992年 / 141卷 / 02期

关键词：

D O I：

10.1007/BF00155178

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present Stokes I Zeeman splitting measurements of sunspots using the highly sensitive (g = 3) Fe I line at lambda = 1.5649 mum. The splittings are compared with simultaneous intensity measurements in the adjacent continuum. The relation between magnetic field strength and temperature has a characteristic, nonlinear shape in all the spots studied. In the umbra, there is an approximately linear relation between B2 and T(b), consistent with magnetohydrostatic equilibrium in a nearly vertical field. A distinct flattening of the B2 vs T(b) relationship in the inner penumbra may be due to changes in the lateral pressure balance as the magnetic field becomes more horizontal; spatially unresolved intensity inhomogeneities may also influence the observed relation.

引用

页码：253 / 265

页数：13